Original Posted By: David Scott
while at Oshkosh EAA last week I visited the old hangers (Pioneer Vil )and noticed something on NX211 (see something new every time I gothere)...it has the same cable rub area on the upper leading edge of thehorizontal stabilizer as the Piets..the rub area is solved with the useof a small guide pulley mounted on the top leading edge.....has any Pietbuilder tried this? I know extra weight back there is taboo but if thebuilding is kept light and W&B permits it??? looked to no more than a1" pulley..any comments???JoeCZion, Illinois________________________________________________________________________________
Pietenpol-List: cable rub wear
Pietenpol-List: Re: cable rub wear
Original Posted By:> fishin
I raised the bellcrank on mine,and added 2 pulleys at the rear side ofthe pilots seat due to the direction change of the cables(galvanized),alsoadded nylon fairleads just under the covering where all cables exit,cablesclear the horizontal stab now,looks better to me anyway. Doug Hunt.....
I raised the bellcrank on mine,and added 2 pulleys at the rear side ofthe pilots seat due to the direction change of the cables(galvanized),alsoadded nylon fairleads just under the covering where all cables exit,cablesclear the horizontal stab now,looks better to me anyway. Doug Hunt.....
Pietenpol-List: Re: cable rub wear
Original Posted By: jmcnarry(at)techplus.com (John McNarry)
I also see things on aircraft I have studied before and find a lot ofinteresting solutions to problem areas. De Havilland Tiger Moths DH 82a'suse a sleeve positioned on the cables at the rub points and the sleeveslides through an eye mounted on the front edge of the stab. The sleeveprotects the cable from abrasion and doesn't have misalignment problems apulley might present. Neat huh? I also was involved in a discussion at Brodhead in '96 about theelevator cables going slack as the deflection nears each end of the travel.I had noticed that some Piets didn't have this problem and others did. Thesolution is careful geometry of the elevator horns and the bell crank. Theidea being to keep the bell crank horns and hinge points acting as aparallelogram. The same builder also recommended raising the bell crankpivot so the cables would not touch the stab. His didn't. No increase incomplexity or weight either.John Mc________________________________________________________________________________
I also see things on aircraft I have studied before and find a lot ofinteresting solutions to problem areas. De Havilland Tiger Moths DH 82a'suse a sleeve positioned on the cables at the rub points and the sleeveslides through an eye mounted on the front edge of the stab. The sleeveprotects the cable from abrasion and doesn't have misalignment problems apulley might present. Neat huh? I also was involved in a discussion at Brodhead in '96 about theelevator cables going slack as the deflection nears each end of the travel.I had noticed that some Piets didn't have this problem and others did. Thesolution is careful geometry of the elevator horns and the bell crank. Theidea being to keep the bell crank horns and hinge points acting as aparallelogram. The same builder also recommended raising the bell crankpivot so the cables would not touch the stab. His didn't. No increase incomplexity or weight either.John Mc________________________________________________________________________________
> cable rub wear
Original Posted By: Greg Yotz
> > while at Oshkosh EAA last week I visited the old hangers (Pioneer Vil )> and noticed something on NX211 (see something new every time I go> there)...it has the same cable rub area on the upper leading edge of the> horizontal stabilizer as the Piets..the rub area is solved with the use> of a small guide pulley mounted on the top leading edge.....has any Piet> builder tried this? I know extra weight back there is taboo but if the> building is kept light and W&B permits it??? looked to no more than a> 1" pulley..> any comments???> JoeC> Zion, Illinois> ________________________________________________________________________________
> > while at Oshkosh EAA last week I visited the old hangers (Pioneer Vil )> and noticed something on NX211 (see something new every time I go> there)...it has the same cable rub area on the upper leading edge of the> horizontal stabilizer as the Piets..the rub area is solved with the use> of a small guide pulley mounted on the top leading edge.....has any Piet> builder tried this? I know extra weight back there is taboo but if the> building is kept light and W&B permits it??? looked to no more than a> 1" pulley..> any comments???> JoeC> Zion, Illinois> ________________________________________________________________________________